With the rapid development of artificial intelligence, automatic driving technology and intelligence of mining, unmanned intelligent vehicles in mines have gradually become the important tool for improving operation efficiency in mines, reducing accident incidence and saving costs. In this paper, the key technologies, functions and challenges faced of unmanned intelligent vehicles in mines are systematically analyzed. First, the application background of driverless technology in mine environment is discussed as well as such key technologies as perception, decision making, control and communication it needs in mining operations are analyzed. Second, the core functions of unmanned intelligent vehicles in mines including auto drive and path planning, collaborative operations, safety and exception handling are proposed. Finally, the technical challenges faced by unmanned intelligent vehicles under the working conditions of complex geographical environment, severe weather and high load are analyzed as well as the solutions are proposed and development trend of unmanned intelligent vehicles in the future is prospected. This paper is aimed to provide the theoretical supports and technical references for research and applications of unmanned intelligent vehicles in mines.

In this paper, the measurement methods of gauge, diagonal and horizontal bending of main beam for metallurgy crane are mainly studied. Traditional measurement methods for crane with such tools as steel wire and ruler are with such disadvantages as low efficiency, poor accuracy, strict conditions and high safety risk. In order to finish the measurement work of metallurgy crane accurately and efficiently, several methods for measuring gauge, horizontal bending and diagonal of metallurgy crane using instruments and tools are studied as well as the traditional measurement methods of crane are improved and innovated. Practices show that the efficiency of measuring metallurgy crane is greatly improved with these measures.

The heating in smelting and rolling laboratory is with natural gas radiation as well as the CO generated by natural gas leakage and incomplete combustion can lead to such accidents as fires and explosions very easily. In the article, a wireless and low-cost detection system of flammable gas is developed, which is with the STM32F103 series single chip computer as main control system. The concentrations of methane and CO in workshop are monitored with MQ-2 and MQ-7 gas sensors, temperature and humidity in workshop are monitored with SHT30 sensor of temperature and humidity as well as the data collected by sensors is transmitted to mobile terminal with Bluetooth module. The data processing and analysis are realized with mobile terminal and Android operating system, which could meet the requirements of monitoring flammable gas used in smelting and rolling laboratory.

With the scaling up of air separation equipment, the capacities of supporting motors for air compressor, supercharger and oxygen reciprocating compressor are also increased. The capacity of motor for air compressor is developed to over 20,000 kW and scaling up of motor has brought unprecedented challenges for control and starting of motor and power grid. The start-up process of high-capacity motor is particularly complicated. On the one hand, the influences on power grid should be considered, on the other hand, the impact on motor and starting equipment should also be considered. Various starting modes are adopted based on conditions and demands in the industry, the reduction voltage with auto transformer discussed in the paper is one of mature reduced voltage starting technologies. The impact of auto transformer on power grid is low as well as it is with simple operation and stable performances, so it is widely used in the air separation industry. If the control mode of reduced voltage starting for auto transformer is selected improperly, it will cause certain damages to motor. The start control of auto transformer is studied and analyzed through cases in the paper.

Dust removing fan is the key equipment of blast furnace production system. If there is abnormal vibration of fan equipment, the fault alarm would be triggered. As a result, there is not dedusting air volume in the environmental dedusting system so as to cause such environmental pollutions as flying dust. In the paper, it is proposed the causes and solutions for vibration fault of motor for dust removing fan for blast furnace by taking the basic principle of “high efficiency, high quality, low cost, green and environmental” as well as elaborated strengthening method for foundation bolt of motor and how to solve the problem of motor vibration with the six-point positioning principle. This method has been validated through field practices, which could effectively prevent and solve the problem of unnatural vibrations for dust removing fan.

In the wave of digital transformation, the intelligent operation and maintenance technology has gradually become important method for enterprises to improve operating efficiency and reduce costs. Grafana, as the visual monitoring tool of open source data, is widely used in intelligent operation and maintenance with its powerful data integration ability and flexible visual interface. In this paper, it is discussed the applications of Grafana in operation and maintenance of iron and steel enterprises as well as analyzed its core functions, best practices and practical cases, which are aimed to provide references and guidance for enterprises to implement intelligent operation and maintenance.

With the development of global economy, the energy poor and environmental pollutions are becoming increasingly serious as well as low carbon and environmental protection, energy conservation and emission reduction have become the focus of global attention. In this context, Baotou Iron & Steel (Group) Co., Ltd. actively responds to the call of the country, promotes elimination and replacement of old-fashioned diesel locomotives, which are committed to achieving green and low-carbon railway transportation. In this article, the transformation ideas, technical solutions and practical application effects are discussed by taking the research and development and application of pure electric locomotives in factory region of Baotou Steel as object of study. The practical application shows that the effects of pure electric locomotives on saving energy as well as reducing consumptions, carbon emissions and noises are significant. The research of this article provides the solutions for green railway transportation of all industries as well as practical references for promoting green transformation of rail transit equipment in our country and high quality co-construction of the “Belt and Road”.

Enterprise archives are important components of scientific research achievements of enterprises as well as with such important functions as ensuring the traceability and confidentiality of scientific achievements and knowledge accumulation. With the continuous development and progress of enterprises, the management mode of enterprise archives also needs to be constantly innovated and transformed to meet the needs of technological innovation and development in the new era. In this article, it is aimed to discuss the direction and path of innovation transformation for management mode of enterprise archives in scientific research institutes, which could provide beneficial references for innovation and improvement of management mode of enterprise archives.

In this paper, such aspects as microstructure, hardness and wear resistance of rare earth wear resistant steel plate BTNM450 of Baotou Steel and NM1^# wear resistant steel plate produced by a foreign manufacturer are selected to be compared and analyzed. The study results showed that the wear extent of rare earth wear resistant steel plate BTNM450 of Baotou Steel was 0.390 0 g, which was significantly fewer than that of NM1^# wear resistant steel plate. Compared with the wear resistant steel plate BTNM450-NORE without adding rare earth elements, the wear extent of rare earth wear resistant steel plate BTNM 450 of Baotou Steel after adding rare earth elements is reduced by 20.9%. The hardness distribution on section of NM1^# wear resistant steel plate is not uniform and hardness of rare earth wear resistant steel plate BTNM450 of Baotou Steel does not change significantly along the direction of section thickness, which is with excellent wear resistance.

In this article, the stability of old underground space in Sanheming Iron Mine is analyzed with the FLAC^3D numerical simulation software as well as distribution laws of stress, displacement and plastic zone of old space with effects of self weight stress field are studied. It is aimed at judging whether old space is stable to analyze the stability of old space with effects of its self weight stress field in order to provide effective preventive measures for managing old space of mine as well as ensure safe and efficient mining of mineral resources. The stability of old space with effects of self weight stress field is considered to be good through 3D modeling and numerical calculations. The study results can provide references for stability analysis of underground goaf in similar iron mines, which is with certain guiding role in ensuring safe production and reducing geological disaster risks as well as significances to promote sustainable development of mineral resources of Sanheming Iron Mine.